LIBRARY

SYNOPSIS

DESCRIPTION

The
Fn acl_set_file
function associates an access ACL with a file or directory, or
associates a default ACL with a directory. The pathname for the file or
directory is pointed to by the argument
path_p

The effective user ID of the process must match the owner of the file or
directory or the process must have the CAP_FOWNER capability for the
request to succeed.

The value of the argument
type
is used to indicate whether the access ACL or the default ACL associated
with
path_p
is being set. If the
type
parameter is ACL_TYPE_ACCESS, the access ACL of
path_p
shall be set. If the
type
parameter is ACL_TYPE_DEFAULT, the default ACL of
path_p
shall be set. If the argument
type
specifies a type of ACL that cannot be associated with
path_p
then the function fails.

The
acl
parameter must reference a valid ACL according to the rules described on the
acl_valid3
manual page if the
type
parameter is ACL_TYPE_ACCESS, and must either reference a valid ACL or an ACL with zero ACL entries if the
type
parameter is ACL_TYPE_DEFAULT. If the
acl
parameter references an empty ACL, then the
Fn acl_set_file
function removes any default ACL associated with the directory referred to
by the
path_p
parameter.

RETURN VALUE

Rv -std acl_set_file

ERRORS

If any of the following conditions occur, the
Fn acl_set_file
function returns
-1
and sets
errno
to the corresponding value:

Bq Er EACCES

Search permission is denied for a component of the path prefix or the
object exists and the process does not have appropriate access rights.

Argument
type
specifies a type of ACL that cannot be associated with
path_p

Bq Er EINVAL

The argument
acl
does not point to a valid ACL.

The ACL has more entries than the file referred to by
path_p
can obtain.

The
type
parameter is not ACL_TYPE_ACCESS or ACL_TYPE_DEFAULT.

The
type
parameter is ACL_TYPE_DEFAULT, but the file referred to by
path_p
is not a directory.

Bq Er ENAMETOOLONG

The length of the argument
path_p
is too long.

Bq Er ENOENT

The named object does not exist or the argument
path_p
points to an empty string.

Bq Er ENOSPC

The directory or file system that would contain the new ACL cannot be extended or the file system is out of file allocation resources.

Bq Er ENOTDIR

A component of the path prefix is not a directory.

Bq Er ENOTSUP

The file identified by
path_p
cannot be associated with the ACL because the file system on which the file
is located does not support this.

Bq Er EPERM

The process does not have appropriate privilege to perform the operation to set the ACL.

Bq Er EROFS

This function requires modification of a file system which is currently read-only.

STANDARDS

IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)

The behavior of
Fn acl_set_file
when the
acl
parameter refers to an empty ACL and the
type
parameter is ACL_TYPE_DEFAULT is an extension in the Linux implementation, in order that all values returned by
Fn acl_get_file
can be passed to
Fn acl_set_file .
The POSIX.1e function for removing a default ACL is
Fn acl_delete_def_file .